Depth gauge



FIG. 1 is a top perspective view of the depth gauge;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a third side view thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is an end view thereof.

The broken lines shown in FIGS. 1-5 illustrate portions of the depthgauge that form no part of the claimed design.

CLAIM The ornamental design for a depth gauge, as shown and described.